ID COX1_AEGCO Reviewed; 524 AA. AC P68540; P08741; DT 01-AUG-1988, integrated into UniProtKB/Swiss-Prot. DT 23-NOV-2004, sequence version 1. DT 13-SEP-2023, entry version 88. DE RecName: Full=Cytochrome c oxidase subunit 1; DE EC=7.1.1.9; DE AltName: Full=Cytochrome c oxidase polypeptide I; GN Name=COX1; Synonyms=COI, COXI; OS Aegilops columnaris (Goatgrass) (Triticum columnare). OG Mitochondrion. OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; OC Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade; OC Pooideae; Triticodae; Triticeae; Triticinae; Aegilops. OX NCBI_TaxID=4493; RN [1] RP NUCLEOTIDE SEQUENCE [GENOMIC DNA]. RA Ikeda T.M., Tsunewaki K.; RT "Deficiency of cox1 gene expression in a wheat having Aegilops columnaris RT cytoplasm results in an impaired cytochrome c oxidase activity."; RL Submitted (MAR-1996) to the EMBL/GenBank/DDBJ databases. CC -!- FUNCTION: Component of the cytochrome c oxidase, the last enzyme in the CC mitochondrial electron transport chain which drives oxidative CC phosphorylation. The respiratory chain contains 3 multisubunit CC complexes succinate dehydrogenase (complex II, CII), ubiquinol- CC cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III, CC CIII) and cytochrome c oxidase (complex IV, CIV), that cooperate to CC transfer electrons derived from NADH and succinate to molecular oxygen, CC creating an electrochemical gradient over the inner membrane that CC drives transmembrane transport and the ATP synthase. Cytochrome c CC oxidase is the component of the respiratory chain that catalyzes the CC reduction of oxygen to water. Electrons originating from reduced CC cytochrome c in the intermembrane space (IMS) are transferred via the CC dinuclear copper A center (CU(A)) of subunit 2 and heme A of subunit 1 CC to the active site in subunit 1, a binuclear center (BNC) formed by CC heme A3 and copper B (CU(B)). The BNC reduces molecular oxygen to 2 CC water molecules using 4 electrons from cytochrome c in the IMS and 4 CC protons from the mitochondrial matrix. {ECO:0000250|UniProtKB:P00401}. CC -!- CATALYTIC ACTIVITY: CC Reaction=4 Fe(II)-[cytochrome c] + 8 H(+)(in) + O2 = 4 Fe(III)- CC [cytochrome c] + 4 H(+)(out) + 2 H2O; Xref=Rhea:RHEA:11436, CC Rhea:RHEA-COMP:10350, Rhea:RHEA-COMP:14399, ChEBI:CHEBI:15377, CC ChEBI:CHEBI:15378, ChEBI:CHEBI:15379, ChEBI:CHEBI:29033, CC ChEBI:CHEBI:29034; EC=7.1.1.9; CC Evidence={ECO:0000250|UniProtKB:P00401}; CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:11437; CC Evidence={ECO:0000250|UniProtKB:P00401}; CC -!- COFACTOR: CC Name=heme; Xref=ChEBI:CHEBI:30413; CC Evidence={ECO:0000250|UniProtKB:P00401}; CC Note=Binds 2 heme A groups non-covalently per subunit. CC {ECO:0000250|UniProtKB:P00401}; CC -!- COFACTOR: CC Name=Cu cation; Xref=ChEBI:CHEBI:23378; CC Evidence={ECO:0000250|UniProtKB:P00401}; CC Note=Binds a copper B center. {ECO:0000250|UniProtKB:P00401}; CC -!- PATHWAY: Energy metabolism; oxidative phosphorylation. CC {ECO:0000250|UniProtKB:P00401}. CC -!- SUBUNIT: Component of the cytochrome c oxidase (complex IV, CIV), a CC multisubunit enzyme composed of a catalytic core of 3 subunits and CC several supernumerary subunits. The complex exists as a monomer or a CC dimer and forms supercomplexes (SCs) in the inner mitochondrial CC membrane with ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1 CC complex, complex III, CIII). {ECO:0000250|UniProtKB:P00401}. CC -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane CC {ECO:0000250|UniProtKB:P00401}; Multi-pass membrane protein CC {ECO:0000250|UniProtKB:P00401}. CC -!- SIMILARITY: Belongs to the heme-copper respiratory oxidase family. CC {ECO:0000305}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; U46764; AAA91209.1; -; Genomic_DNA. DR AlphaFoldDB; P68540; -. DR SMR; P68540; -. DR UniPathway; UPA00705; -. DR GO; GO:0005743; C:mitochondrial inner membrane; IEA:UniProtKB-SubCell. DR GO; GO:0045277; C:respiratory chain complex IV; IEA:InterPro. DR GO; GO:0004129; F:cytochrome-c oxidase activity; IEA:UniProtKB-EC. DR GO; GO:0020037; F:heme binding; IEA:InterPro. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW. DR GO; GO:0015990; P:electron transport coupled proton transport; IEA:InterPro. DR GO; GO:0006119; P:oxidative phosphorylation; IEA:UniProtKB-UniPathway. DR CDD; cd01663; Cyt_c_Oxidase_I; 1. DR Gene3D; 1.20.210.10; Cytochrome c oxidase-like, subunit I domain; 1. DR InterPro; IPR023616; Cyt_c_oxase-like_su1_dom. DR InterPro; IPR036927; Cyt_c_oxase-like_su1_sf. DR InterPro; IPR000883; Cyt_C_Oxase_1. DR InterPro; IPR023615; Cyt_c_Oxase_su1_BS. DR InterPro; IPR033944; Cyt_c_oxase_su1_dom. DR InterPro; IPR014241; Cyt_c_oxidase_su1_bac. DR NCBIfam; TIGR02891; CtaD_CoxA; 1. DR PANTHER; PTHR10422; CYTOCHROME C OXIDASE SUBUNIT 1; 1. DR PANTHER; PTHR10422:SF18; CYTOCHROME C OXIDASE SUBUNIT 1; 1. DR Pfam; PF00115; COX1; 1. DR PRINTS; PR01165; CYCOXIDASEI. DR SUPFAM; SSF81442; Cytochrome c oxidase subunit I-like; 1. DR PROSITE; PS50855; COX1; 1. DR PROSITE; PS00077; COX1_CUB; 1. PE 3: Inferred from homology; KW Calcium; Copper; Electron transport; Heme; Iron; Magnesium; Membrane; KW Metal-binding; Mitochondrion; Mitochondrion inner membrane; KW Respiratory chain; Translocase; Transmembrane; Transmembrane helix; KW Transport. FT CHAIN 1..524 FT /note="Cytochrome c oxidase subunit 1" FT /id="PRO_0000183276" FT TRANSMEM 18..38 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 66..86 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 103..123 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 148..168 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 186..206 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 237..257 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 269..289 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 312..332 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 340..360 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 379..399 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 414..434 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 447..467 FT /note="Helical" FT /evidence="ECO:0000255" FT BINDING 41 FT /ligand="Ca(2+)" FT /ligand_id="ChEBI:CHEBI:29108" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 46 FT /ligand="Ca(2+)" FT /ligand_id="ChEBI:CHEBI:29108" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 64 FT /ligand="Fe(II)-heme a" FT /ligand_id="ChEBI:CHEBI:61715" FT /ligand_note="low-spin" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 243 FT /ligand="Cu cation" FT /ligand_id="ChEBI:CHEBI:23378" FT /ligand_label="B" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 247 FT /ligand="O2" FT /ligand_id="ChEBI:CHEBI:15379" FT /evidence="ECO:0000250|UniProtKB:P00396" FT BINDING 292 FT /ligand="Cu cation" FT /ligand_id="ChEBI:CHEBI:23378" FT /ligand_label="B" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 293 FT /ligand="Cu cation" FT /ligand_id="ChEBI:CHEBI:23378" FT /ligand_label="B" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 370 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /ligand_note="ligand shared with subunit 2" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 371 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /ligand_note="ligand shared with subunit 2" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 378 FT /ligand="heme a3" FT /ligand_id="ChEBI:CHEBI:83282" FT /ligand_note="high-spin" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 380 FT /ligand="Fe(II)-heme a" FT /ligand_id="ChEBI:CHEBI:61715" FT /ligand_note="low-spin" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000250|UniProtKB:P00401" FT BINDING 443 FT /ligand="Ca(2+)" FT /ligand_id="ChEBI:CHEBI:29108" FT /evidence="ECO:0000250|UniProtKB:P00401" FT CROSSLNK 243..247 FT /note="1'-histidyl-3'-tyrosine (His-Tyr)" FT /evidence="ECO:0000250|UniProtKB:P00401" SQ SEQUENCE 524 AA; 57757 MW; ECD6E0AAB74F1DE1 CRC64; MTNMVRWLFS TNHKDIGTLY FIFGAIAGVM GTCFSVLIRM ELARPGDQIL GGNHQLYNVL ITAHAFLMIF FMVMPAMIGG FGNWFVPILI GAPDMAFPRL NNISFWLLPP SLLLLLSSAL VEVGSGTGWT VYPPLSGITS HSGGAVDLAI FSLHLSGISS ILGSINFITT IFNMRGPGMT MHRLPLFVWS VLVTAFLLLL SLPVLAGAIT MLLTDRNFNT TFFDPAGGGD PILYQHLFWF FGHPEVYILI LPGFGIISHI VSTFSRKPVF GYLGMVYAMI SIGVLGFLVW AHHMFTVGLD VDTRAYFTAA TMIIAVPTGI KIFSWIATMW GGSIQYKTPM LFAVGFIFLF TIGGLTGIVL ANSGLDIALH DTYYVVAHFH YVLSMGAVFA LFAGFYYWVG KIFGRTYPET LGQIHFWITF FGVNLTFFPM HFLGLSGMPR RIPDYPDAYA GWNALSSFGS YISVVGIRRF FVVVAITSSS GKNQKCAESP WAVEQNPTTL EWLVQSPPAF HTFGELPAVK ETKS //